Why wouldn't Sonada be considered evil? We never saw any actual motivation with her.
Why would you give Tojima and Eleen the switches back? It was explained early on that the switches amplify emotions (Erin's anger being the best example. Her memory of using the switch may be gone, but not her feelings). Kijima and Tatsumori were psychos through and through.
And Leo has all the switches. It's kinda obvious any climax involving him is just gonna be him spamming them.

However, Taurus's switcher did seem like a sensible and nice guy, putting up with Yuuki's shenanigans without getting angry. I'd like to see what drives him.

Actually I was thinking this or even Gentarou. Seeing as being friends with people is his gimmick I think it would make sense for him to be Gemini.

But Kengo would be awesome and much more likely. After his progression from disliking others, distrusting others, being friends with everyone, being healed thanks to Aquarius, now he's strong enough to use a switch. Or even be Fourze like he originally intended. However I'd say he'll be presented with a chance to be a Horoscope and his desire to have power will finally be fulfilled.

Gentaro becomes a Horoscope and after Ryusei fails to stop him, Tachibana comes down with a second Fourze driver for Kengo and Kengo becomes the new Fourze, freeing Gentaro.
Then cue the 3 way Henshin of Gen, Kengo, and Ryu.

Also, any speculation on Virgo's identity?

I think Virgo is actually Emoto

I think right now that's the general consensus. There's no other logical choice for who it could be. He makes the most sense right now.

Finally saw the episode


Was the only one who thought that the whole tense moment towards the end was ruined with "Uchuu Kita/Uchu Ikuzo"?